定义一个时期

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How many working days in year 2021?

Here is the detail of the calculation:

Because 2021 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 52 sundays. It remains 261 days.

Now, let's remove 8 public holidays that do not fall during a weekend and we obtain 253 working days in 2021.

Here is the list of these 8 public holidays:

1. New Year's Day : 星期五, 2021, 01, 1
2. Good Friday : 星期五, 2021, 04, 2
3. Easter Monday : 星期一, 2021, 04, 5
4. Early May Day Bank Holiday : 星期一, 2021, 05, 3
5. Spring Bank Holiday : 星期一, 2021, 05, 31
6. Late Summer Bank Holiday : 星期一, 2021, 08, 30
7. Christmas Day (substitute day) : 星期一, 2021, 12, 27
8. Boxing Day (substitute day) : 星期二, 2021, 12, 28